Water-filter.



R. CAMPBELL,

WATER FILTER. APPLICATION FILED DEO.13, 1910.

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WATER FILTER.

APPLIOATION FILED DEC. 13, 1910.

, Patented Apr. 21,1914

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Specification of Letters Patent.

Patented Apr; 21, 1914.

Application filed December 13 1916. Serial-=1 0.59%102.

To all whom it may concern Be it known that I, RICHARD CnMrBELL, a subject of the King of Great Britain, residing at Liverpool, in the countyof Lan- 5 caster, England, have-invented certaln new and useful Improvements in Water-Filters, "of which the following is a specificatlon.

Ihis invention relates to improvements in apparatus for filtering and purifying water for feeding boilers and otherpurposes. It has reference to that type-of filter wherem there is a containing chest with two or more filtering chambers and a filtering body in each, so' arranged that the filtering bodyfin one chamber will do-the first filtration and the partly purified water is then-passed through the subsequent filtering body or bodies to complete the filtration. I

According to 'my present invention, I make the filtering body in each chamber of a corrugated cylinder, of theytype referred to in. LettersPatent No. 555,020, issued under date of February Railton jointly with myself. lhese corrugated cylinders, while occupying very little more space than. a plain cylinder or cylinders, are-much more eflicient, sinceby reason of the corrugations a greatly increased filtering area is afforded. Furthermore, in order to prevent the filtering bodies getting choked with impurities, quent renewal and cleaning, I prefer to arrange the filtering bodies horizontal, and provide means-in each chamber to collect the impurities that drop ofithe corrugated cylinders. By providing an arrangement of this kind, the filter-can remain in use for a much longer period before opening it for cleaning purposes, and the impurities can be automatically discharged from the chambers while the filter is actually in use. i

A further feature of the invention is that the filtering bodies in the chambers are 3o1ned together, so, that when the lidis Figure l i'sa longitudinal sectionfFig. 2,"

an' end view; Fig. 3, a longitudinal section on an; enlarged scale of the partition; and Fig. 4, a face view thereof.

In. these'figures A is the'chest or casing cylinder,

18,1896, to 'William' and: avoid too fretaken off, both or all can be removed as aw of the filter having an inlet B .for the unpu-rified water and an'outlet C for the purified water. This chest or casing A is divided by a removable diaphragm or partition D into two chambers E and F, the bottomof each chamber being formed hoppershaped inwhich impurities will collect and can be removed" from time to/time by drain cocks G at the bottom. The inlet B communicates with one chamber E and the outlet G Withthe other chamber F. Inthe one chamber is pl'aced a filtering shell G formed-with flannel-covered corrugations or rings, which collectivelyform a corrugated and in the other chamber another similar filtering shell I-I'. These filtering shells are placed in the so that water from the inlet B is forcedto pass first through the filtering walls of the path; of the water,

shell G into the inZerio-r G 1 thereof, thence I through passages i the partition into the second chamber F on the outside of the sec .OIldShGll' H, then through its corrugations into the interior H, and so to the outlet C,

and .thus'a double filtration of the liquid takes place. By this means the filtering area is greatly increased, while occupying very littlemore space, and furthermore the arrangement enables me to have a coarse filtering medium on the one filtering shell G- -to separate'the' coarser impurities from the water,- and.finer cloths on the other shell 1 H toeffect the final filtration of the water and free it from the finer impurities which have escaped through the walls of the other filtering shell.

The partition between the two chambers, consists of a diaphragm D having a tubular center boss (I closed at one end d',.'and open at the other, from the outside of'which boss 03, the diaphragm D radiates obliquely in such a manner as to leave a port or ports I between it and'the closed end d of the boss 65. The outer perimeter. of the diaphragm D is provided with a flange D, against which and the perimeter there is seated a rubber ring J, which latter seats itself against a shoulder a between the two hopper shaped cavities of thechests E F. The respective shells each embody a corrugated chamber or a cylinder built up of perfo' rated flafigc'd rings or segments secured to-.--

gether (and collectively forming a-corru gated 'cylinder, z'i e;- a, cylinder with a series ofexternal' channels alternating with inter,

nal ones). At one end each shell abuts against the opposite ends of the tubular bess (Z, of the partition D, the bore of the boss (Z and the bore of the corrugated shells G andII being identically the same, so that one will fotm' as it were, a continuation of the other. The tubular boss can be jointed to the ends of the shells by flanges if desired. The boss d carries four or any suitable number of bolts K, the said bolts being provided with a screwed part at or about mid length, which is screwed into screwthreaded holes in the boss d, so that the bolts project at each side through the bore G II of the shells, and the several rings which collectively form the two shells can thus be bolted together and to the central 'boss (Z of the partition when the nuts K at the two ends of the bolts K are screwed up. At the outer end, the first shell is secured by the bolts to an end plate L which is seated against the door lid M of the chest, and between this end plate and the lid is a strong helical spring .N. This plate L closes the bore of the shell G at that end. At the outer end the second shell is bolted to an .annular end plate L arrangedto form a water-tight joint with the end of the chest; thus forexample, there may" bean annular rib Z on the end plate L which seats itself against seating a, at that end of the chest.v The filtering shells are forced by the helical. spring N in one direction so that the partition will make a liquid tight joint against the shoulder a, and effectively separates the chest into two chambers. The said spring N also forces the rib on the end plate L of the second shell against the seating 11; at the end of the chest, and makes a liquid tight joint there. So long therefore as the door M is bolted up, joints are made, which prevent the unfiltered water penetrating into the delivery side of the filter, without penetrating the filtering flannels. A distributer O is provided above the first shell to distribute the water over its corrugations.

The mode of action is as follows :The water under pressure entering through the inlet conduit B isdistributed over the outside of the corrugations of the first shell G, and percolates through the filtering surface thereof, leaving the coarser impurities, grease, et cetera, behind on the filtering flannels. The, partly purified water then flows through the bore G of shell G into the hollow boss at of the partition, but is here stopped from flowing direct into the .bore of the other shell by the closed end (1' of the boss, and so is deflected by the ports I into the second chamber F of the chest, and is distributed over the'outs'ide of the corrugations of the second shell H. The water percolates'through this into its 1nterior or bore H, and in so doing is further purified, the purified water being finally delivered through the bore of the annular end plate L to the outlet. conduit C, the impurities having been arrested by thefiltering llanncls of the second shell II. The construction is such that no water can penetrate into the outlet conduit C of the filter from the inlet conduit 13, except by first passing through the filtering tlannels of both shells (1' and II, thus securing a double filtration. The usual by-pass Q can however be provided and is brought into use when required. The impurities collecting on the outside of the shells falls into the trough shaped containers at the bottom of the chambers F. and F from whence they are removed from time to time, while the filter is m use, by opening the drain cocks G. The shells G and It being by preference horizontally" placed, instead of vertically one above t he other, admit of this collection oi impurities which otherwise might choke the shells. By removing the lid M both filtering shells can be removed as a whole and not separately.

One face of the partition l) is formed witha curved flange D forming a groove. This serves for securing one end of the liltering cloth or flannel of one shell. The end of the cloth is placed in the groove 1) and tied around with wire or cord S to secure it, and the cloth throughout its length made to conform to the corrugations of th shell, and tied down in the corrugations il desired The partition D can be perforated also, as well as the shells, provided the liltering cloth covers the perforations thereof. The end of the filtering clothfor the second shell is tied down in a groove R formed by the opposing ends of the shell It and boss (I. j The shells can easily be removed from the chest for cleaning, by taking off the lid M,

and both shells with the center partition I) can then be drawn out.

I do not confine myself to two chambers with a filtering shell in each, as if desired three or more can be provided and the water made to pass through each in turn. Also each shell can be made in one piece, instead of being built up of separate rings.

I declare that what 1 claim isz- 1. In a filter, the combination of a chest or casing'provided with two chambers, one

chamber being provided with an inlet opening and the other with an outlet; and a filtering member removable as a whole and adapted to be mounted in said chest, said member comprising a centrally-disposed diaphragm having openings or passages extending therethrough, shells secured to and carried by said diaphragm upon opposite sides thereof, a filtering medium mounted upon each of said shells, and means for securing said diaphragm and shells in position.

2. In a filter, the combination of a chest or casing, provided with two iutercommunill-T , phragm and shells in eating chambers; an inlet opening into one chamber and an outlet extending from the other; a diaphragm adapted to be seated between the two chambers, said diaphragm having openings or passages extendin therethrough; filtering shells secured to sai diaphragm, one upon each sidethereof; a filtering cloth secured upon each shell, the cloth of one shell overlying the openings-in the diaphragm; andmeans for securing the diaphragm and shells in position within the chest or casing. 3. In a filter, the combination of a chest or casing provided with two chambers; an inlet opening into one chamber and'an outletextending from the other; a diaphragm adapted to make a close joint with the walls of the chest or casing between the two chambers, said diaphragm being provided "with a series of openings extending therethrough; a pair of filtering shells secured to the diaphragm, one upon each side thereof; a groove formed uponeach side of the diaphragm; a filtering cloth secured upon each shell and terminatingat one end in one of the grooves, where it is secured, one of said cloths overlying the opening in the diaphragmf and means for securing the diaposition in the chest or vcaslng.

4. In a filter, the combination of a chest or casing provided with two chambers, one having an inlet and the other an outlet opening; a diaphragm adapted to make close contact with the walls of the chest or casing between the two chambers, said diaphragm having openings or passages extending therethrough; filtering elements carried by said diaphragm, onefin each chamber, said diaphragm ar d filtering elements being removable as a unit; and a dising to the first chamber and serving to disor casing provided with two alinedchainbers; an inlet openin'g'into one and an.out

witnesses.

let eiitending from the-other of cham- I bersl;""a filtering me ber adapted ctd be mounted in said chambers, said. member comprising a diaphragm carrying a packing ring, said ring being adapted to make close ,contact with .the- Wallsof the chest or .casing'between the two cl1ambers',said 'diaphra'gm having openings extending theregreater than the openings formed in thediaphragm,- a plurality of bolts. extending from the diaphragm to .each side thereof, pair of end plates one for each chamber, a coirugated ring-shaped member mounted upon the bolts to each side of the diaphragm and between it and'theend plates, and filtering cloths mounted upon said' ring-shaped members, secured'thereto and to the diaphragm; and means-for securing the filtering member thus composedin position within the chest or casing. I

'6. In a filter, the combination-of a chest provided .with two' intercommunicating chamb rs, one chamber. being provided with. an inlet opening and the other with an outlet; a diaphragm having openings therein and adapted to make close contact. with the walls of'the chest between the two cham- ,bers'; a,hol1ow filtering shell for each cham- 7 her, said shells-being connected to and separated by the diaphragm, the fluid passing from the interior of the first shell, through the openingsin the diaphragm, and to the exterior of'the second shell; and means for securing said shells and the diaphragm as a- I unit in position Within the chest. tributer located in the inlet opening lead- In witness whereof; I have hereunto signed my name this 29th day of November. 1910, in the presence of two subscribing R. CAMPBELL. ywitnesses a i Jr. C. DYMOND,

H. LSHovBmnen. 

